IB/qib: Don't mark VL15 bufs as WC to avoid a rare 7322 chip problem
Don't set write combining via PAT on the VL15 buffers to avoid a rare
problem with unaligned writes from interrupt-flushed store buffers.
Signed-off-by: Dave Olson <dave.olson@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
diff --git a/drivers/infiniband/hw/qib/qib_tx.c b/drivers/infiniband/hw/qib/qib_tx.c
index f7eb1dd..af30232 100644
--- a/drivers/infiniband/hw/qib/qib_tx.c
+++ b/drivers/infiniband/hw/qib/qib_tx.c
@@ -340,9 +340,13 @@
if (i < dd->piobcnt2k)
buf = (u32 __iomem *)(dd->pio2kbase +
i * dd->palign);
- else
+ else if (i < dd->piobcnt2k + dd->piobcnt4k || !dd->piovl15base)
buf = (u32 __iomem *)(dd->pio4kbase +
(i - dd->piobcnt2k) * dd->align4k);
+ else
+ buf = (u32 __iomem *)(dd->piovl15base +
+ (i - (dd->piobcnt2k + dd->piobcnt4k)) *
+ dd->align4k);
if (pbufnum)
*pbufnum = i;
dd->upd_pio_shadow = 0;